Screw driver and method of making the same



April 22,1930, z w. F. HOBBS 1,755,822

SCREW DRIVER AND METHOD OF MAKING THE SAME Filed Feb 3, 1928 Patented Apr. 22, 1930 UNITE rats WILLIS F. HOBBS, OF BRIDGEPGRT, CONNECTICUT, ASSIGNOR TO THE BRIDGEPORT HARDWARE MANUFACTURING GORPORATION,.- OIE BRIDGE-PO31, CONNECTEC'UT, A

CORPORATION OF CONNECTICUT scnnw DRIVER AND METHOD or-makrne 'rrrn SAME Application filed February 3, 1928. Serial No. 251,480.

This invention relates to a screw driver or similar tool, and has for an obJect to pro vide an improved construction and -method of making the same in which no drilling operations are required, and therefore, metalmay be used too hard and tough for convenient drilling, thus producing a tool which is very tough and will stand almost anyuse to which it is put.-

It is also an object of the invention to provide a construction inwhich the .handleand ferrule cannot be driven down the shank, but are always held in the proper position.

With the foregoing and other objects in view, I have devised the construction illustrated in the accompanying drawing forming a part of this specification. In this drawing, V

Fig. 1 is a side elevation of a screw driver involving my invention.

Fig. 2 is a longitudinal section of the handle substantially on line 2-2 of Fig. 1.

Fig.- 8 is an end elevation of the handle lookingv from the left of Fig. 1, and

Fig. 4 is a transverse section substantially on line H of Fig. 2.

The tool, in the present instance a screw driver blade, is shown at 10 and has ashank 11 in one piece with the blade and forgedwith a shoulder 12 on the shank. Placed on the shank and seated against this shoulder is a metal ferrule 13 having-a socket 14 at its opposite end. A handle 15, preferably of wood, although it may be of other suitable material if desired, has a reduced end 16 seated tightly in the socket in the ferrule, and the shank 11 is of such a length as to extend through the handle to substantially its opposite end as shown in Fig. 2. The shank also preferably has one or more longitudinal ribs 17 embedded in the material of the handle to prevent turning of the shank in the handle,

and the handle may be provided with longitudinal grooves 18 in its outer surface to provide a good grip. At the outer endof theextending shoulder 12.

and it is preferably secured by shrinking the head onto the shank.

In'manufacturing, the tool and shank are in one piece and'is forged with the outwardly I The ferrule 13 is placed'on the shank with one end engaging this shoulder andthen the handle 15 is placed on the shank with its reduced end seated tightly in the ferrule. The head or cap 19 is then applied and permanently secured to the shank, preferably by shrinking it onto the shank, and the head, therefore. holds the handie in the ferrule with the ferrule tightly against the shoulder making a substantially unitary structure. Thus if the user should hammer on the head the force of the blows would be transmitted directly to the shank and tool. that there is no possibility of its sliding down the shank and the handle and ferrule are firm: i

ly secured between this shoulder and the head or cap. This structure renders it impossible to drive the ferrule down the shank, and the head or cap prevents the handle and ferrule from moving in the opposite direction. They are, therefore, always heldin the proper position. It will be noted no drillingoperations are required, and therefore. very hard tough steel may be used to withstand any uses to which the tool may be put.

Having thus set forth the nature of my invention, what I claim is 1. A screw driver or similar tool comprising a tool and shank forged in one piecewith a shoulder on the shank spaced from the end thereof a metal ferrule havin a bore closel end of the handle and having a socket closed at its inner end permanently attached to the end of the shank by being shrunk onto the end j of the shank so that the head is substantially in one piece therewith.

2. A. screw driver or similar tool comprising a tool and shank forged in one piece and The shoulder holds the ferrule so ill with a shoulder on the shank spaced from the end thereof, a ferrule on the shank engaging the shoulder at one end and having a socket in its opposite end, a handle embracing the shank and seated at one end in said socket, and a metal head at the opposite end of the hendle and having an inward extension provided with a socket closed at its inner end and V shrunk onto the end of the shank.

3. The method of making a screwdriver or similar tool which comprises forging the tool and a shank in one piece with a shoulder on the shank spaced from the end thereof,- placing a ferrule on the shank with one end engaging the shoulder, placing a handle on the shank with one end seated inthe ferrule then shrinking n hie/tel head having a socket closed at its inner end on the endoi'f tl e shank atthe opposite end of the handle to make this head snbstentielly in one piece with the shank and to secure the handle and ferrule together with the ferrule against said shoulder.

In testimony whereof I nth}; niv signature.

WILLIS F. HOBBS. 

